Draft-gage.



L. M. ELLISON.

DRAFT GAGE. v APLlCATIUN FILED FEB- 2,1917.

Lm; Y Patented Api. 16s ma T" 'ille i i dei@ a fitr RAET-GAGE.

ineen-ei.

Application filed February 2, 1917. Serial No. 146,098.

To all wtom it may concern:

lBe it known that I, Lewis citizen ofV the United States, and residentof Chicago, count-y ot Cook, and State of Illinois, have yinventedcertainl new and useful Improvements in Draft-Gages, of which thefollowing is a specilication and which are illustrated in theaccompanying drawings, Jforming 'a part thereof.

The invention relates to draft gages and has iolits object to provide.an instrument for this purpose which is of improved constructionparticularly with a vienT4 to secur y ing greater convenience in use andto reducing the liabilityto injuryin service. rllhe invention` isexemplified in the structure to be hereinafter described and which isillustrated in the accompanying drawings, wherein- Figure 1 is avertical sectional rien', the plane of the section being indicated bythe line 1-1 on Fig. le.

Fig. 2 is a trent elevation,

Fig. Bis a side elevation with the attac ing lug's and a detail of thesupporting'part shown in section, v

Fig. 4 is similar to a detail of Fig. 3, but shows a different 'form ofattaching device, and

5 is a sectional vien7 taken on the line 5 5 @t Fig. e.

The features 'of improvement are illustrated in connection with a scaletube gen-4 :ally designated 10, made in the forni of a. ti and having abulb 11 at the upper end of one of the legs, as l2, of the U. The otherleg, as 13, hereinafter referred to as outer leg of the U tube isextended in front of a graduated scale 111. Preferably the tube 10 andthe scale '1l are inclosed Within a metal case 15 to which a glass front16 is applied.

'in carrying out the invention the U tube it() is constructed to permitof the scale 'lli and the associated part of the tube being locatedclose behind the glass front 16 of the case, vvitlwut requiring the caseto be of great depth. rihe indications upon the scale le are thus morereadily observed and when pointers, as 17 and 18. are placed over t`.eglass front 16, the importance of taking the reading from directly infront of the scale and from the enactvlevel oi the pointers, is reduced.As shown, the bulb li is 'of an upright cylindrical forni and the axisoitl the bulb is suliciently odset from the lineof the Specification ofLetters Eatent.

M. Ennison, a

outer leg 13 of the il to be located a substam tial distance in rear ci'the plane ot the scale 14. ln `order that the chamber olf the case 15may be of reduced depth in all parts., eX- .cept that part whichincluses the bulb, 1l, the inner leg, as 12,01 the il tube 1() ispreferably .located at the saine distance freni the glass front- 1'6 asthe outer leg 13. This is readily brought about by providing an elbow 19for connecting tbe upper end ot the inner lee' 12 of the tube with thebulb 11, the connection being 'thereby inade with the iront wall oil;the bulb 11 adjacent its lower end.

ln the usual operation of the device when made in the 'jorxn shown, thecliainb r of the bulb 11 should be open tothe atmosphere. Under thesecircumstances it is desirable to prevent the ei'itrance oi dust intolthebulb chamber. As shown, the formed with a socket 2O atits upper id tcreceive the top of the bulb il and the rirn oi? the Ibulb is firmly held'.thin 'the socket 20 by al cement paclingll. A

vFor the purpose of venting the chamber of the bulb 11 Withoutpermittingthe entrance of'dust, the end wall of the socket 20 is formed with atubular nipple and a vented dust cap, generally designated Q3, andhaving a threaded stein is appted to this nipple. As shown, the upperend oi the dust cap Q3 is formed with a chamber 2li and a tube ,risesinto this chamber, the bore of the tube being extended through the stein50 of the dust cap to connnunicate with the bore of the nipple 22. The'cnainbor is closed at the top by a reinoval'ile solid cover 26, but anopening 2? is prcvided in the side Wall of thechainber at its lo'verend. 'it ifollows from this construction it' a suitable dust filter isprovided in the chamber 524, as by filling the said chamber with a.loose packing of cotton, or the like, (not shown) the chamber et thebulb il will. be vented but dustvwill be excluded. lireierably a screen28 is extended across the chamber above the opening 2'? to support thesail packing.

d.ln order that the tl tube 10 may be connected with the part to betested, the upper end ol? the outer leg' 155 of the tube is alsoextended into a socltet provided in the end Patented Apr. it, dell icevfcmupollely remomg le ci mr fand, the 5mm' 3Q has is, tubular ssm ad @issiem is formed wih :1 nera opening nm'f he buse of the Stem. now, 21 :as@'75, be appiod m @he envoy: 32 at "che n h@ Sen] 3:2 the fhxmaei f heplug 31') w be Seide( when the Cover is Classe-d wl@ mnng back @muy willsew@ npen he chamber ih@ phlg 3G to the aib t sphere Wi'hou' comma-wij.;wmvng Cova/*fx hat the Case Snoulf xzmy damped suppomg surface ai, onj/a single Ender these ccumszmces zwquai the suppoing Surface have noeffect 1 the Coxained As shawn, ik@ case 15 is mmed iashng Eug, as 89,which is to be appied fio the supporting surface, 'dla mung Eug, as 41?, being merely la out upon this lug. mwuugy mak@ iii: 1n fh@ neming 4Gthrough l md proviion is made foy pre-- *ma scrcw 44 m' ali boluginserted ..u' @Dough gim- Hw head o ho :row tu om se bushing. Thisbushmg may he om piece of meai tune, as 48,

us: puy..

, a cap apphm to h aperure 11 he @mi wail @if the Suu?, socket., thesaid @ap boing @hmm beruf o 'eceva a. @ausi iler Mld ik@ hm "bei beingvented adjacen, its

owe? onu, :1. tube Y H19 can, he bow of 'the ubs csmnuninb in uolnbnaon?a, i: ,1, (i scr-Lk tube mmme w @hun my fh@ casing, the ende o :hv 'tubobeing heid 'in he WaHS of fha Qnsngg, 21 imi? of upclmad lugs forme onthe casing malls, one of 1h43 Engr? having a mmm@ fue@ fm engezgj'emn whthe face of a support :md the other ing being ccaed nviwl-yfiu from? @if*bhe plan@ of /he conf'mct face im: engagement Wi h @the sup- 4. In adraft gage, in combinationma," `chambered casing having a Hat glass.front,

a scale tube and connected bulb mounted Within the chamber of thecasing, and housed thereby, a part of the scale tube adjacent the bulbbeing transverse to the axis of the bulb and the body of the scaletubebeing forwardly offset from the axis of the bulb to extend adjacent theglass front of the casing.

5. In a draft gage, in combination, a chambered casing having a flatglass front and-the chamber of-the casing being of un- I vuniform widthfrom front' to rear, the rear Wall of the narrower part of the chamberbeing flat, a scale marked upon lthe said fiat part of the rear ywall ofthe chamber and a tube and connected bulb mounted within the chamber ofthe casing and housed thereby, the bulb fitting the Wider part of the-lchamber and the tube being offset from the LEWIS M. .ELLISONQ axis ofthe bulb and extending in front of

